Braking mechanism.



T. V. BU'CKWAL'TER.

BHAKING MEOHANISM. APPLICATION FILED AuG.IB. 1914.

II JH lasenteu App. 13, 1915.

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` rnacr v. BUcxWAL'rEn, or: ALTOONA, PENNSYLVANIA.

BEARING' MECHANISM.

i appneanon sied August 1a, 1914.

To aZZyur/n/mi it m-ajz/ concern Be it known that 1, TRACY V. BUCK- wamnn, a citizen of the United States, residing at Altoona, in the county of Blair and vState of Pennsylvania, have invented certain improvements in' Braking Mechanism, of which the following is a specification.

lMy invention is an improved braking mechanism designed more especially for use ,on baggage trucks.

is a part elevationl of a baggage truck em-v bodying my improvements; Fig. 2 is an en larged part sectional elevation of details of the construction shown in Fig. 1; and Fig. 3 is a part section al elevation at right angles to the view shown in Fig. 2

The mechanism, as illustratedv in thel drawings, comprises the traction wheels l journaled on the axle 2, which supports the body 3 and is provided with the bearings 4 for the pins 5, the latter passing through the bea-rings G of the handle or drawbar 7 The wheels 1 have the circular shells or drums 8 fixed thereto concentrically and the axle 2 has fixed thereon the yokes 9 provided with the hubs 10 on which are fixed the circular shoes 11, within the shells 8 re-4 spectively; springs 12 being drawn over the yokes and connected with the segments of the shoes on opposite sides of the'hubs to draw such segments inwardly and disenga ge the shells. y

- Shafts 13, journaled in bearings 14 on the Yaxle 2 and in bearings 15 on the yokes' 9,

have fixed on their outer ends the diamond shaped cams 16 which lie between and act onthe bearings 17 of the shoes 11, the cams being turned by the shafts to spread the shoes and causethem to'frictionally engage the shells. s Y

Rollers 18 are mounted on the inner ends l of the shafts 13 and chains 19 pass over these rollers from the bolts 20 to the arms 21 fixed to the bearings 6. The bolts 20 Specification of Letters Patent., Ptntd Apr. 13, 1915.

Serial No. 857,304.

ha ve bearings 22 held in adjustable position thereon by the nuts 23, and coiled springs 24: are held between the bearings 22 `and bearings 25 fixed to the bearings or bra'ck ets 14. lt will be seen that when the handle 7 is pulledl down, the arms 21 move downwardly therewith and act through the parts 19, 20,` and 22 to compress the-springs 24 which, upon the release of the handle, act to elevatev it.

Arms 2G are fixed on the inner ends of the shafts 13, arms 27 are fixed to the bearings f3, and set screws 28 carried by the arms 2T are adapted to engage the arms 26, when the handle is elevated to turn the shafts 13 and cause the cams 16 to spread the brake shoes 1.1 so as to frictionally engage the shells 8, by which the wheels are held. The

force applied to operating the brakes canbe regulated by adjusting the positions of the bearings 22 and the screws 28.

It will be understood that when the lever 7 is drawn down, the screws 28 are Withdrawn from the arms 6, the shafts 13 are free ,to turn, and the springs 12 withdraw the shoes 11 from the drums 'or shells 8, the

said means and adapted to effect the release,

of said arm.

2. A braking mechanism comprising the .combination with a wheel and a friction member fixed thereto, of a friction member adapted for engaging said friction member first named, a journaled shaft pr vided with an arm for turning it and a. cam foroperating said friction member lsecond named, a lever mechanism, means comprising a spring whereby said lever mechanism is caused to act upon said arm, and manuallyi operated means for rocking said lever mechanism, contracting said spring and dispngaging sald arm,

3. A braking mechanism comprising the combination with a wheel and a friction member fixed thereto.y a brake shoe disposed within said member, a spring for withdrawing said shoe from said member, a journaled ros shaft having an arm for operating it and a .cam for moving said shoe into engagement vvithisaid member, a draw bar, and. means comprising a spring for elevating said draw bar and actuating said arm, said bar being adapted for operating said means to contract said spring last named and release said arm. y

I 4. A braking mechanism comprising, in combination with 'an axle and a Wheel revoluble thereon, a frictional braking device lcarried by said wheel, africtional braking device carried by said axle, a fulcrumed draw-bar, means comprising a spring and a tensionfmember for automatically elevating said dravvbar and engaging said brakingv device second named lwith said braking device first' named, and means, released by moving said draw-bar to operative position, for disengaging said braking device second named from said braking device irst named.

5. A braking mechanism comprising, in combination with an axle and a Wheel revoluble relatively thereto, a' drumv fixed `to said Wheel, abrake shoe adapted for engaging said drum, a cam for spreading said shoe, a journaled shaft to which said cam is fixed, a lever fulcrumed on said axle, a spring for operating said lever, and 4means whereby said lever operates said shaft'.

6. A braking mechanism comprising, in

naled shaft carried by combination with an axle and a Wheel rev' oluble relatively thereto, a friction member fixed tosaid AWheel, a friction member carried by said axle and adapted for engaging said friction member first named, a jour said axle, a cam on said shaft and engaging said second friction member, a spring acting through said shaft to move said cam and second named friction member in one direction, and a spring for moving said second named friction member the opposite direction.

v 7. A braking mechanism comprising, in combination with an axle anda Wheel revoluble' relatively thereto, friction members carried by said Wheel and axle respectively, a lever, fulcrumed on said axle, a spring connected With and adapted to operate said lever, a cam operable by said lever for moving one of said friction members relatively to the other, and a spring connected with to the other.

In testimony whereof I have hereunto Set my name this 12th day of August, 1914, in the presence of the subscribing Witnesses.

TRACY V. BUCKWALTER.

Witnesses:

J. F. MECK, H. C. MINs'rnR.

Copies of this .patent may be obtained for ve cents each, by addressing the Commissioner of ZPatents,

Washington, D. C.

'one of said members for moving it relatively' 

